Check for Intermittent Problems

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ANTI-LOCK BRAKE SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

1. CHECK FOR INTERMITTENT PROBLEMS

HINT
A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected using the ECU Data List function of the Techstream.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Follow the directions on the Techstream to display the Data List and select areas where momentary interruption should be monitored.





HINT
* A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned to ON (initial check).
* If the status remains on (ERROR displayed), check for continuity between the ECU and the sensors, or between ECUs.
* The ERROR display on the Techstream remains on for 1 second after the harness signal changed from momentary interruption (open circuit) to normal condition.

ABS/VSC/TRAC:

(f) While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.





OK:

NORMAL display appears.

HINT
The connector and/or wire harness has a momentary interruption (open circuit) if the display changes. Repair or replace the connector and/or wire harness as one of them is faulty.